JPH03159010A - Outer tape winding method for wire harness - Google Patents

Abstract

PURPOSE:To maintain flexibility of a wire harness by inserting a jig into a plurality of electric wires, winding tapes on a bundle of the electric wires, and pulling out the jig. CONSTITUTION:After a jig 5 is inserted into a bundle of electric wires 4 and tapes are wound on the bundle, the jig 5 is pulled out to form an empty space 7 in the bundle of the electric wires 4. By this method, while the most outer layer of the bundle of the electric wires becomes fixed condition with high adhesion strength, each wire of an electric wire group in the inner layer can move freely each other, especially, toward parallel direction to the electric wire, which is a longitudinal direction, since the empty space 7 is formed in the inner layer of the electric wire group. While maintaining adhesion strength between tapes each other, electric wires inside of the wire harness wound with tapes can be loosened by untwisting the wire harness several times. In this way, flexibility of a wire harness can be maintained.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing a wire harness for an automobile, and in particular, a method for manufacturing a wire harness in a tape winding process of wrapping and finishing with vinyl tape during the manufacturing process. It is something that takes place in between.

[Prior Art] A wire harness is a product in which a plurality of wires are cut to a predetermined length, electrical connectors are fixed to the ends of the wires, and the wires are laid out on an assembly drawing board and then wrapped and bundled with vinyl tape. It is. Therefore, in order to adjust the size, branch position, direction, etc. of the wire bundle, the vinyl tape had to be tightly wrapped around the wire bundle.

[Problem to be solved by the invention] Automotive wiring harnesses are a key to vehicle comfort.

With the advancement of car electronics as well as improvements in safety and driving performance, the number of electric wires has increased dramatically, and there is a need to make them smaller in diameter and lighter in weight. As a result, the number of electric wires to be wrapped with tape increases, and the wire harness itself becomes hard, and if it is forcibly bent, it will become bent at that part, which will impede the work of packing the wire harness and assembling it into a car.

Therefore, in order to solve the above-mentioned problems, the present invention proposes a method of maintaining the flexibility of the wire harness by providing an extra space in the wire bundle when winding the wire harness with an exterior tape.

[Means for Solving the Problems] The method for wrapping a wire harness with an exterior tape of the present invention is such that, during wire wiring work in the manufacture of wire harnesses, tape winding designations are made approximately at the center of a bundle of wires having designated tape winding sections. A rod-shaped jig with a dimension longer than the section and approximately circular in cross section is attached along the flow direction of the wire, and in this state tape is wrapped around the outer periphery of the wire bundle.Then, the rod-shaped jig is removed and the wire bundle is An extra space is provided approximately in the center of the space.

In other words, in this method, after each wire has been laid on the assembly drawing board, a jig is inserted into the approximate center of the wire bundle, the wires are gathered evenly around the jig, and the tape is removed from the east of the wire. After winding the wire harness in the same manner as in the conventional method, the jig is removed and the relevant area is massaged several times to make the finished wire harness flexible.

[Function] The method of wrapping a wire harness with an exterior tape of the present invention inserts a jig into the bundle of wires, wraps the tape over the jig, and then removes the jig to create extra space in the bundle of wires. establish.

As a result, the outermost layer of the wire bundle is fixed with good adhesion due to the tape, but the wires in the inner layer are provided with extra space, so each wire can be freely connected to each other, especially in the longitudinal direction. It will be in a state where it can move in the direction parallel to the electric wire.

By loosening this wire harness several times, you can loosen the wires wrapped in tape while ensuring the adhesion between the tapes.

[Example] A specific example of the method for wrapping a wire harness with an exterior tape according to the present invention will be described with reference to FIG.

There are a plurality of assembly jigs 3 set on the assembly drawing board 1, and a rod-shaped jig 5 is placed in advance between the assembly jigs 3a and 3b where the tape winding designated section is located. 3b, and in this state, a plurality of electric wires with electrical connectors 2 attached are wired.

After completing the wiring, as shown in FIG. 2, place the rod-shaped jig 5 at the center of the wire bundle, place the wires around the outside of this rod-shaped jig 5, and attach the wire bundle 4 together with this rod-shaped jig 5. The adhesive and niruchi 16 are wound around the outer periphery of this substantially circular wire bundle 4, which is kept in a substantially circular cross section.

After winding the Niruchi 16, hold the jig gripping part 5a formed at one end of the rod-shaped jig 5, and twist the jig 5 in the direction of arrow A to make it easier to pull out. By loosening this wire harness several times, the adhesion between the tapes is ensured, and as shown in FIG. Since the extra space 7 is formed in the inner layer of the wire bundle, the arrangement can be arranged with a degree of freedom.

As a result, the wire harness is finished as if the tape was wound very loosely, and the wire harness becomes flexible.

The rod-shaped jig 5 is a simple one as shown in FIGS. 4 and 5, but it is a rod-shaped jig that is installed on the wire bundle 4 that has been wired on the assembly drawing board 1. 5 jig tip 5
C should be rounded to an extent that does not cause damage to the wire.

Then, in order to improve the ease with which the jig can be pulled out after winding the tape, a lubricant is applied to the jig and a slight taper is provided on the jig insertion 1IW5b, and the jig grip shown in FIG. The jig itself is provided with an angle like the part 5a. In addition, as shown in FIG.
There is also a method of providing a shape that lowers the frictional resistance with the electric wire. The rod-shaped jig 5 as shown in FIG. 8 has a jig gripping portion 5a.
It is also possible to devise a structure in which the jig insertion portion 5b and the jig insertion portion 5b are T-shaped, and the annular uneven portion 8 of the jig insertion portion 5b is spiral-shaped.

The length and thickness of the jig can be set according to the size of the wire harness, and the shape can be arbitrarily selected, such as a round bar or square bar as shown in Figure 7, according to the usage conditions. Bye.

[Effect of the invention] After inserting a jig into a plurality of electric wires and wrapping tape over the bundle of electric wires, the jig is removed and massaged several times to ensure adhesion between the tapes. However, the group of wires wrapped in tape can move freely, making the wire harness flexible.

Since the jig is inserted, the tape winding force is just as tight as in the past, and the efficiency of the tape winding work remains the same as in the past.

By winding the wire harness with tape according to the present invention, the wire harness becomes flexible and can be bent even slightly by the simple operation of inserting a simple rod-shaped jig into the bundle of wires and then pulling it out. This has the effect that the bending is easily bent during packaging work, and the bending returns to normal when assembled into an automobile, so that assembly work is not hindered.

In addition, by changing the shape of the rod-shaped jig depending on the type and shape of the wire bundle, it is possible to artificially provide an extra space of any size and change the flexibility.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing the manufacturing method of the present invention, Fig. 2 is a sectional view of a wire bundle showing a state in which a jig is inserted after winding the tape, and Fig. 3 is a diagram showing the jig being removed after winding the tape. FIG. 4 is a front view of a rod-shaped jig with a tapered part, FIG. 5 is a front view of a rod-shaped jig with a gripping part, and FIG. FIG. 7 is a cross-sectional view of the rod-shaped jig showing the shape of the annular uneven portion, and FIG. 8 is a partial view of the rod-shaped jig showing the shape of the annular uneven portion. Front view 1... Assembly drawing board, 2... Electrical connection tool, 3... Assembly jig. 4... Wire bundle, 5... Rod-shaped jig, 6... Tape,
7... Surplus space part, 8... Annular uneven part

Claims (1)

[Scope of Claims] 1. A rod-shaped jig with a substantially circular cross-section and a dimension longer than the tape-wrapping designated section is placed approximately at the center of a bundle of wires having a designated tape-wrapping section in wire wiring work for manufacturing wire harnesses. is installed along the flow direction of the wire bundle, and in this state, tape is wrapped around the outer periphery of the wire bundle, and then the rod-shaped jig is removed to create an extra space approximately in the center of the wire bundle. Wire harness exterior tape winding method 2, a wire harness exterior tape winding method according to item 1, characterized in that an annular uneven portion is provided on the surface of the rod-shaped jig.